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P-nary细分多层B样条算法及曲面拟合
P-nary Subdivision Multilevel B-Splines Algorithm and Surface Approximation
【摘要】 多层B样条方法在曲面的拟合中提供了新的途径。在证明均匀B样条基函数P-nary细分方程基础上,给出了均匀B样条曲线的P-nary细分控制点之间的计算公式,进而讨论了B样条曲面的P-nary细分问题,并将其用于层次B样条曲面拟合。提出了基于P-nary细分多层B样条曲面拟合算法。该算法加快了层次B样条曲面拟合中网格加细后曲面控制点的计算,数值实例显示所给算法的有效性。
【Abstract】 The multilevel B-splines approximation is a good method for surface reconstruction.In this paper,the subdivision formulae for B-splines basis function and B-splines curves are first given,then the B-splines surfaces subdivision are discussed.An algorithm of surface reconstruction based on multilevel B-splines of P-nary subdivision is proposed which fast computing the control points of refined B-splines surfaces.Experimental results demonstrate the algorithm is valid.
【关键词】 计算机应用;
多层B样条;
P-nary细分;
曲面拟合;
【Key words】 computer application; multilevel B-splines; P-nary subdivision; surface approximation;
【Key words】 computer application; multilevel B-splines; P-nary subdivision; surface approximation;
【基金】 国家自然科学基金资助项目(10171026)
- 【文献出处】 工程图学学报 ,Journal of Engineering Graphics , 编辑部邮箱 ,2008年01期
- 【分类号】TP391.7
- 【被引频次】1
- 【下载频次】169